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/* cli/help.c - Show dynamic help text
* Copyright (C) 2001,2005,2006 Bruce Guenter <bruce@untroubled.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "iobuf.h"
#include "msg.h"
#include <time.h>
#include "systime.h"
#include <stdlib.h>
#include <string.h>
#include "cli.h"
#include "internal.h"
static unsigned calc_max_width()
{
/* maxwidth is the maximum width of the long argument */
unsigned maxwidth = 0;
unsigned i;
for(i = 0; i < cli_option_count; i++) {
unsigned width = 0;
cli_option* o = cli_full_options[i];
if(o->name) {
width += strlen(o->name);
switch(o->type) {
case CLI_STRING: width += 6; break;
case CLI_INTEGER: width += 4; break;
case CLI_UINTEGER: width += 4; break;
case CLI_STRINGLIST: width += 5; break;
case CLI_FUNCTION: width += 6; break;
case CLI_SEPARATOR: width = 0; break;
case CLI_FLAG: break;
case CLI_COUNTER: break;
}
}
if(width > maxwidth)
maxwidth = width;
}
return maxwidth;
}
static void show_option(cli_option* o, unsigned maxwidth)
{
if(o->type == CLI_SEPARATOR) {
obuf_put3s(&outbuf, "\n", o->name, ":\n");
return;
}
if(o == &cli_help_option) obuf_putc(&outbuf, '\n');
if(o->ch) {
obuf_puts(&outbuf, " -");
obuf_putc(&outbuf, o->ch);
}
else
obuf_puts(&outbuf, " ");
obuf_puts(&outbuf, (o->ch && o->name) ? ", " : " ");
if(o->name) {
const char* extra = "";
switch(o->type) {
case CLI_STRING: extra = "=VALUE"; break;
case CLI_INTEGER: extra = "=INT"; break;
case CLI_UINTEGER: extra = "=UNS"; break;
case CLI_STRINGLIST: extra = "=ITEM"; break;
case CLI_FUNCTION: extra = "=VALUE"; break;
case CLI_FLAG: break;
case CLI_COUNTER: break;
case CLI_SEPARATOR: break;
}
obuf_put3s(&outbuf, "--", o->name, extra);
obuf_pad(&outbuf, maxwidth - strlen(o->name) - strlen(extra) + 2, ' ');
}
else
obuf_pad(&outbuf, maxwidth+4, ' ');
obuf_put2s(&outbuf, o->helpstr, "\n");
if(o->defaultstr) {
obuf_pad(&outbuf, maxwidth+10, ' ');
obuf_put3s(&outbuf, "(Defaults to ", o->defaultstr, ")\n");
}
}
void cli_show_help(void)
{
unsigned maxwidth;
unsigned i;
obuf_puts(&outbuf, cli_help_prefix);
maxwidth = calc_max_width();
for(i = 0; i < cli_option_count; i++)
show_option(cli_full_options[i], maxwidth);
obuf_puts(&outbuf, cli_help_suffix);
}
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